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Bessel beam
About: Bessel beam is a research topic. Over the lifetime, 1946 publications have been published within this topic receiving 42264 citations.
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TL;DR: It is demonstrated analytically and experimentally that a circular abruptly autofocusing (AAF) Airy beam can be generated by Fourier-transforming an appropriately apodized Bessel beam whose radial oscillations are chirped by a cubic phase term.
Abstract: We demonstrate analytically and experimentally that a circular abruptly autofocusing (AAF) Airy beam can be generated by Fourier-transforming an appropriately apodized Bessel beam whose radial oscillations are chirped by a cubic phase term. Depending on the relation between the chirp rate and the focal distance of the Fourier-transforming lens, it is possible to generate AAF beams with one or two foci, the latter case leading to the formation of an elegant paraboloid optical bottle.
158 citations
TL;DR: In this paper, a transmission-type coding metasurface is proposed to bend normally incident terahertz beams in anomalous directions and generate nondiffractive Bessel beams in normal and oblique directions.
Abstract: Coding metasurfaces, composed of an array of coding particles with discrete phase responses, are encoded with predesigned coding sequences to manipulate wavefronts of electromagnetic (EM) waves and realize novel functionalities such as anomalous beam deflection, broadband diffusion, and polarization conversion. Such a new concept can be viewed as a bridge linking metamaterial and digital codes, yielding the investigation of metamaterials from a digital perspective and eventually the realization of real-time control of EM waves. Here, we propose and experimentally demonstrate a transmission-type coding metasurface to bend normally incident terahertz beams in anomalous directions and generate nondiffractive Bessel beams in normal and oblique directions. To overcome the larger reflection and strong Fabry–Perot resonance that usually originate from a thick silicon substrate, a free-standing design is presented for the coding particle, which is formed by stacking three metallic layers with four polyimide space...
157 citations
TL;DR: This paper presents a technique to generate Bessel beams with a tunable axial intensity within the accessible range of spatial frequencies and demonstrates how one can form a Bessel beam with a varying propagation constant along its axial extent which results in a Tunable scaling of its lateral cross-section.
Abstract: Due to their immunity to diffraction, Bessel light modes potentially offer advantages in various applications. However, they do exhibit significant intensity variations along their axial propagation length which hampers their applicability. In this paper we present a technique to generate Bessel beams with a tunable axial intensity within the accessible range of spatial frequencies. The beam may be engineered to have a constant intensity along its propagation length. Finally, we demonstrate how one can form a Bessel beam with a varying propagation constant along its axial extent which results in a tunable scaling of its lateral cross-section.
153 citations
TL;DR: A Bessel beam is used that obviates the need to locate precisely the cell membrane, permitting two-photon excitation along a line leading to cell transfection, and demonstrates celltransfection beyond obstacles due to the self-healing nature of the Besselbeam.
Abstract: The ability to permeate selectively the cell membrane and introduce therapeutic agents is a key goal in cell biology. Optical transfection is a powerful methodology but requires exact focusing due to the required two-photon power density. The authors use a Bessel beam that obviates the need to locate precisely the cell membrane, permitting two-photon excitation along a line leading to cell transfection. Assuming a minimum efficiency of 20%, the Bessel beam offers transfection at axial distances 20 times greater than that of its Gaussian equivalent. Furthermore, the authors demonstrate cell transfection beyond obstacles due to the self-healing nature of the Bessel beam.
148 citations
TL;DR: The theory, generation, properties, and applications of various non-diffracting beams, including the Bessel beam, Mathieu beam, and Airy beam, are reviewed in this paper.
Abstract: “Non-diffracting” beams do not spread as they propagate. This property is useful in many areas. Here, the theory, generation, properties, and applications of various “non-diffracting” beams, including the Bessel beam, Mathieu beam, and Airy beam is reviewed. Applications include imaging, micromanipulation, nonlinear optics, and optical transfection.
145 citations